RPD Connectors

Question 1

What is meant by the term ‘major connector’?

Answer 1

Part of the denture that connects components on one side of the arch to components on the other side of the arch

Question 2

What are the properties of an ideal MAJOR connector?

Answer 2

1. Rigid
2. Doesn’t cover gingival margin
3. Comfortable
4. Minimal coverage with consistent rigidity

Question 3

What are the types of MAXILLARY major connectors?

Answer 3

CoCr & ACRYLIC

1. Anterior palatal strap
2. Mid-palatal strap
3. Posterior palatal strap
4. Anteroposterior strap/bar (ring); ONLY CoCr
5. Horseshoe
6. Full palatal coverage

ACRYLIC

1. Spoon
2. Modified spoon (extension onto palatal surfaces of teeth w/ wrought wires, Adam clasps, hooks etc.)
3. Every (spoon with distal stops)

Question 4

What are the types of MANDIBULAR major connectors?

Answer 4

CoCr

1. Lingual bar
2. Lingual plate
3. Dental bar
4. Labial bar

Question 5

What is the default major connector of choice for a lower RPD design?

And what are the requirements?

What are the alternative?

Answer 5

Lingual bar

• 3mm from gingival margin
• 4mm connector height
• 1mm above functional depth FOM
• 2mm thick

==> At least 8mm availble space in total

if not -> sub-lingual bar (but will be thicker 4mm

Question 6

What is a meant by the term ‘minor connector’?

Answer 6

Part of the denture that connects components to the major connector (e.g. rests)

Transfers functional stresses to and from abutment teeth

Question 7

What are the properties of an ideal MINOR connector?

Answer 7

1. Rigid
2. Finish above survey line
3. Cross gingival margin at right angles (large enough angle to easily clean)
4. Cover as little gingival margin as possible